 | | Journal (article/letter/editorial) | | experiment on matrix material of the Murchison (C2) meteorite up to 1900°C in vacuo has revealed the evaporation...Lipschutz [9,10] heated a bulk sample o f Murchison meteorite at low pressure (10 -s atm H=) over the temperature...spectrometric analyses on the heated Murchison meteorite up to IO00°C to study the decomposition processes...is not placed on the study of a 14 specific meteorite, but on the universal evolution of fine-grained...Experiments A lump (~10 g) of Murchison (C2) meteorite without crust was crushed in an agate mortar very |  | | Journal (article/letter/editorial) | | which also bear some similarities to those in Renazzo. Its weight ratios of total Fe,?%& and SiO,/MgO...which is not identical to either of these two meteorite types (LEECH and GROSSMAX 1977). In that work...solar value. They also noted that the metal in Renazzo has similar Ni and Co contents to these. but lower...Cr. except for sample I, cause it to resemble Renazzo metal more than that of C2’s. 0.96 0.96 --___...C2 chondrites. but with affinities to those in Renazzo. In Table 4. the bulk chemical composition of the |  | | Journal (article/letter/editorial) | | and nonmagnetic fractions of six CR chondrites (Renazzo, Y793495, PCA91082, EET92042, Acfer 209 and El...of volatile elements is an important issue of meteorite research. Gas-solid fractionation during condensation...coexistence of highly unequilibrated phases in the Renazzo meteorite, the lack of meteorites of the same petrology...petrology and chemistry left the classification of Renazzo uncertain (Mason and Wiik, 1962; Mason, 1971; McSween... 1982). Also because of its unique chemistry, Renazzo was usually excluded from comparative discussion |  | | Journal (article/letter/editorial) | | assemblages from the MAC 87320, EET 92011, and Renazzo CR carbonaceous chondrites. The objectives of this...Ni-rich metal. The assemblages in Renazzo contain tochilinite, magnetite, troilite, pentlandite, and phosphate...phosphate. In all of the assemblages in Renazzo the tochilinite is fine grained and intimately mixed with...with troilite, pentlandite, or magnetite. Opaque assemblages in CR chondrites record a complex history...All rights reserved. 1. INTRODUCTION The Renazzo meteorite was first identified as distinct from other |  | | Journal (article/letter/editorial) | | chondrite plsnets than C2. C2’s are more abundant in meteorite collections than Cl’s (18 vs. 5 known), but this...minerals (chiefly a serpentine-like mineral, magnetite, and sulfides). The oom~sition of the high-~m~rature... r , KABA , , I : AL I , RAIS 1 I A RENAZZO . 11-m . _ . (GROSNAJA, mklIu-. 5 C, I_...C3): continuation of Fig. 1. Haripura through Renazzo are arranged in order of incrwsing content of chondrules...going from -150/o by vol. in Haripura to -700/O in Renazzo. The ordering is approximate, being based on visual |  | | Journal (article/letter/editorial) | | Pnnted in U.S.A. + 00 Origin of metallic Fe-Ni in Renazzo and related chondrites MIN SUNG LEE,* ALAN E. RUBIN...Co-Ni correlation among metal grains from the Renazzo and Al Rais chondrites reported in previous studies...chondrule margins, chondrule rims, and matrix) in Renazzo, Al Rais, and the related chondrite, MacAlpine...INTRODUCTION THE UNGROUPEDCARBONACEOUS chondrite, Renazzo, contains - 120 mg/g metallic Fe-Ni ( WILK, 1969;...highest among carbonaceous chondrite falls. The Renazzo-related meteorites, Al Rais and MacAlpine Hills |  | | Journal (article/letter/editorial) | | by other researchers allow the definition of a Renazzo (CR) group of carbonaceous chondrites. We analyzed...twenty-seven elements. Along with previously analyzed Renazzo, six or more closely related fall events are represented...chondrules (mean size - 700 pm), and the presence of magnetite framboids. Al Rais is’s close relative but too...were studied ~tro~phically along with Renazzo and Al Rais. Renazzo has a lineation possibly caused by fluid-lub~cated...alteration. We suggest that formation of magnetite (and framboidal magnetite in particular) in CI and CR chondrites |  | | Journal (article/letter/editorial) | | Pergamon Press Ltd. Printed in U.S.A. The CR (Renazzo-type) carbonaceous chondrite group and its implications...isotopic study of eight meteorites, identified as CR (Renazzo-type) chondrites, reveals that they have a set...contain microchondrules, microfragments, and magnetite fmmboids and platelets, (3) unique assemblages...water to a greater degree than the rest of the meteorite. The overall degree of hydration in CR chondrites...fiamboidal magnetite in Renazzo matrix as being CI-like. It was later shown that Renazzo has a nitrogen |  | | Journal (article/letter/editorial) | | chemistry and mineralogy of the Bench Crater meteorite, which is a small fragment, previously numbered...unusual features it was different from any other meteorite then represented in terrestrial collections. McSween...examined Adelaide*, a meteorite with features similar to that of Bench Crater. The meteorite was first described...This feature led to our re-investigation of the meteorite. The analysis of Davy and Whitehead is given in...International Commission for Meteorite Nomenclature since the meteorite was not recovered in Adelaide |  | | Journal (article/letter/editorial) | | chondrules (Fa and Fs <5 mol%) in CR chondrites (except Renazzo and Al Rais) consist of silica-rich igneous rims...pyroxene-rich chondrules in general. INTRODUCTION The CR (Renazzo-type) carbonaceous chondrites are primitive meteorites...type I chondrules in most CR chondrites (except Renazzo and Al Rais). Here, we characterize the mineralogy...91082 PCA 91082 PCA 91082 QUE 99177 QUE 99177 Renazzo Renazzo Temple Bar 9 11 20 5 6 MK 6 12 20 26 28 7...= Smithsonian Institution; number = Antarctic Meteorite Working Group designations. b + = present; − = |  | Bischoff, A., Palme, H., Ash, R.D., Clayton, R.N., Schultz, L., Herpers, U., Stöffler, D., Grady, M.M., Pillinger, C.T., Spettel, B., Weber, H., Grund, T., Endreβ, M., Weber, D. (1993) Paired Renazzo-type (CR) carbonaceous chondrites from the Sahara. Geochimica et Cosmochimica Acta, 57 (7) 1587-1603 doi:10.1016/0016-7037(93)90014-n | Journal (article/letter/editorial) | | Pergamon Press Ltd. Printed in U.S.A. Paired Renazzo-type (CR) carbonaceous chondrites from the Sahara...mineralogical similarities to the carbonaceous chondrite Renazzo were recovered at two locations of the Sahara:...26A1contents. The Acfer-El Djouf meteorite is classified as a CR (Renazzo-type) carbonaceous chondrite....comprises three non-Antarctic members (Al Rais, Renazzo, Acfer-El Djouf) and five Antarctic meteorites...lithological components of the Acfer-El Djouf meteorite are large chondrules (up to 1 cm in size; mean |  | Martins, Z., Hofmann, B. A., Gnos, E., Greenwood, R. C., Verchovsky, A., Franchi, I. A., Jull, A. J. T., Botta, O., Glavin, D. P., Dworkin, J. P., Ehrenfreund, P. (2007) Amino acid composition, petrology, geochemistry,14C terrestrial age and oxygen isotopes of the Shişr 033 CR chondrite. Meteoritics & Planetary Science, 42 (9) 1581-1595 doi:10.1111/j.1945-5100.2007.tb00592.x | Journal (article/letter/editorial) | | the degree of terrestrial alteration of this meteorite and also its petrologic classification. Bulk chemical...suggests extensive amino acid contamination of the meteorite from the fall site soil. Nevertheless, Shi∫r 033...have become a source of an increasing number of meteorite finds in the past years (Jull et al. 1990; Ash...interdisciplinary team of researchers analyzed the Shi∫r 033 meteorite. Shi∫r 033 is the first CR carbonaceous chondrite...mineralogical, and isotopic composition of the meteorite as well as the dark CI-like inclusions. Hence |  | Harju, Ellen R., Rubin, Alan E., Ahn, Insu, Choi, Byeon-Gak, Ziegler, Karen, Wasson, John T. (2014) Progressive aqueous alteration of CR carbonaceous chondrites. Geochimica et Cosmochimica Acta, 139. 267-292 doi:10.1016/j.gca.2014.04.048 | Journal (article/letter/editorial) | | contain moderately abundant metallic Fe-Ni, no magnetite, and generally, a few chondrules with clear glassy...altered (e.g., Renazzo and Al Rais), metallic Fe-Ni has been partially replaced by magnetite±sulfide; mafic...chondrites (type-2.0 GRO 95577) contains abundant magnetite, additional oxide phases, iron carbonate, only...chondrites constitute one of the most primitive meteorite groups. There has been minimal thermal metamorphism:...of Brearley, 2006). Some CR chondrites contain magnetite platelets and framboids (e.g., Fig. 7b of Brearley |  | | Journal (article/letter/editorial) | | 73 stony meteorites to identify the nature of meteorite ablation spheres (MAS) and constrain the processes...are dominated by olivine, glass, and accessory magnetite; whereas those of the achondrites are mainly glassy...melted crusts are similar to those of the bulk meteorite. However, differences from whole rock suggest...that are formed by the melting dust particles. Meteorite ablation spheres produced at high altitude probably...probably have compositions very different from bulk meteorite and will resemble cosmic spherules derived from |  | | Journal (article/letter/editorial) | | millerite for S, grossular for Al and Ca, and magnetite for Fe. The beam current was limited to 15 nA...and 6; detailed images are in Figs. 5 and 7. Magnetite-sulfide assemblages occur near each of these areas...Vigarano is an observed fall (22 January 1910 in Ferrara, Italy) and an 11.5 kg stone was recovered quickly...the second stone. Weather records for 1910 in Ferrara, Italy are unavailable, but the website, weatherspark...content. Because Fe is calculated as FeO, if any magnetite were present (due to the occurrence of some oxidized |  | | Journal (article/letter/editorial) | | to 8. Per@mon PreaLtd. Printed The Ftumingb meteorite. M.ineralogyand chemistry PETER R. BVSECK,* BRIAN...09, E&O-O*OO, Cr$$o* O-66; tit&Xl 99.27. THE meteorite fell at 12.60 p.m. on 25 June 1890, in Farmington...Smithsonian Institution has 24 kg. The Farmington meteorite was described by SNOW (1890) and KUXZ and W~~S~EE~K...less than 25,000 years. The appearance of the meteorite is remarkable-it is black, tough and dense, containing...particles are completely disseminated throughout the meteorite thus producing its black color, and large grains-up |  | Schrader, Devin L., Connolly, Harold C., Lauretta, Dante S., Zega, Thomas J., Davidson, Jemma, Domanik, Kenneth J. (2015) The formation and alteration of the Renazzo-like carbonaceous chondrites III: Toward understanding the genesis of ferromagnesian chondrules. Meteoritics & Planetary Science, 50 (1) 15-50 doi:10.1111/maps.12402 | Journal (article/letter/editorial) | | 1111/maps.12402 The formation and alteration of the Renazzo-like carbonaceous chondrites III: Toward understanding...conditions of ferromagnesian chondrules from the Renazzo-like carbonaceous (CR) chondrites, a systematic...However, some opaque minerals (Fe,Ni-metal versus magnetite and panethite) present in type II chondrules are...processes of asteroids in the early INTRODUCTION Renazzo, the type specimen of the CR chondrite group, has...hypotheses for the formation and alteration of meteorite components. Representative sampling of distinct |  | SMITH, Caroline L., RUSSELL, Sara S., GOUNELLE, Matthieu, GREENWOOD, Richard C., FRANCHI, Ian A. (2004) NWA 1152 and Sahara 00182: New primitive carbonaceous chondrites with affinities to the CR and CV groups. Meteoritics & Planetary Science, 39 (12) 2009-2032 doi:10.1111/j.1945-5100.2004.tb00093.x | Journal (article/letter/editorial) | | silicate groundmass with larger silicate, sulfide, magnetite, and Fe-Ni metal (Ni ~50 wt%) grains. Phyllosilicates...1, n = 16). Matrix comprises ~30 vol% of the meteorite and is predominantly sub-micron silicates, with...Meteoritical Bulletin (2001) as an ungrouped C3 meteorite. The thin section analyzed here is from the Institut...Photoshop® computer program. A thin section of Renazzo was analyzed using this method to compare with...predominantly sulfide and magnetite with rare Fe-Ni metal. Often the sulfide/magnetite rim is itself surrounded |  | Varela, Maria Eugenia, Kurat, Gero, Hoppe, Petter, Brandstätter, Franz (2002) Chemistry of glass inclusions in olivines of the CR chondrites Renazzo, Acfer 182, and El Djouf 001. Geochimica et Cosmochimica Acta, 66 (9) 1663-1679 doi:10.1016/s0016-7037(01)00871-7 | Journal (article/letter/editorial) | | glass inclusions in olivines of the CR chondrites Renazzo, Acfer 182, and El Djouf 001 MARIA EUGENIA VARELA... Abstract—Glass inclusions in olivines of the Renazzo, El Djouf 001, and Acfer 182 CR-type chondrites...olivines of these chondrites which belong to the CR (Renazzo-type) group, which is characterized by having “pervasive...“pervasive presence of phases (phyllosilicates, magnetite) produced by hydrothermal alteration, high and...chondrites (two glass inclusions in olivine from the Renazzo chondrite) by Kurat et al. (1997) strongly supported |  | | Journal (article/letter/editorial) | | pentlanditc,oldhamite,daubr•elite, chromite,magnetite,and timehire.The followingminerals,which are well...detail in only a few stony meteorites,be- each meteorite individually, even though each causewith earlier...one-tenth of the meteorites examined. Clovis Renazzo Cold Bokkeveld Richardton Cull[son Dhurmsala...revealed by the infiltration of thin films of magnetite and goethite. plications include the presence...the com mon oxides are limited to chromite, magnetite, and ilmenite. iron, with maximum nickel con |  | | Journal (article/letter/editorial) | | Ocean Water (SMOW) are plotted for the chondritic meteorite groups (Table 4), the Earth (Eiler et al. 2000;...lines are also plotted. Table 1. Chondritic meteorite types. Chondrites Compositiona Carbonaceous CH...Pyroxene, metallic iron, olivine CI Phyllosilicates, magnetite CK Olivine, calcium-aluminum inclusions (CAIs)...achondrite” that is not currently found in our meteorite collections. Estimates of the weight ratios of...ratio), and Fe/ Al (wt. ratio) for the chondritic meteorite groups. CH CI CK CM CO CR CV EH EL H L LL R |  | | Journal (article/letter/editorial) | | kinds of carbonaceouschondrites: (1) carbonaceous Renazzo-like (CR) group, (2) carbonaceous high-metal (CH)...Bencubbin-like group let CH-like group let Ungrouped Renazzo Al Rais El DjoufOOI * Kaidunt Temple Bar EET 87770~...~Paired with 40 other EET meteorites (Antarctic Meteorite Newsletter, 1989, 1994). §Paired with Acfer 207...uncertain. $Paired with QUE 94627 (Antarctic Meteorite Newsletter, 1996). classification than "group"...contain abundant hydrous silicates, carbonates, and magnetite (Weisberg and Prinz, 1991; Weisberg et al., 1993) |  | | Journal (article/letter/editorial) | | groups, as well as the ungrouped Tagish Lake (C2) meteorite, can be reproduced using mixtures of the same...reliable as the elemental and isotopic data used. Meteorite heterogeneity (both within a sample and between...For the CRs, the bulk O isotopic composition for Renazzo was used (Clayton and Mayeda, 1999) because it...and GRO 95577 (CR1) are both more altered than Renazzo. However, Al Rais has an anomalously high matrix...inclusions and the so-called cosmic symplectite (a magnetite-sulfide intergrowth in the ungrouped CC Acfer |  | | Journal (article/letter/editorial) | | Widmanstatten pattern, nebular condensation, meteorite orbits, asteroid spectra); primitive meteoritic...(CAIs), solar-system abundances, organic matter); meteorite ages (radiogenic ages, cosmic-ray ages, charged...elements, noble gases, interstellar grains); and meteorite impacts (impact craters, WT mass extinction)....time was practically the world’s center of modem meteorite research. Harold Urey and Tony Turkevich were...would be a good thing if you were to continue meteorite research.” Obviously, not to fill his shoes-nobody |  | | Journal (article/letter/editorial) | | Mason, 1963) showed that the bulk S content of CR Renazzo is about 30% lower than those in CO chondrites...chondrite Al Rais are about 2 higher than in Renazzo. Abundances of other moderately volatile elements...with bulk compositions for the observed CR fall Renazzo (Wiik, in Mason, 1963; Kallemeyn et al., 1994)...millerite for S, grossular for Al and Ca, and magnetite for Fe. The beam current was limited to 15 nA...troilite, but possibly also some rare chromite or magnetite) than J4a and some of the J4a specks seem to be |
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